CAJ | 학술논문

100%低地板列车是一种新型绿色环保的城市区域交通运输车辆。针对其特殊的车体结构，提出了更高的车内噪声控制要求。通过线路噪声试验，和100%低地板列车车内声源特性的系统测试，定性分析了车内显著声源的传递路径，在此基础上提出车内减振降噪建议措施。试验结果表明，100%低地板列车车内各个测点的声源能量主要集中在中心频率400 Hz～1250 Hz的1/3倍频带，声源位置主要位于地板、顶板以及风挡区域。车内最显著频带声源的传递路径以空气传声为主。控制车辆外部空气声源，提高车体结构的密封、隔声性能是降低车内噪声的可行方法。研究结果可为100%低地板列车车内减振降噪提供参考。
100%저지판열차시일충신형록색배보적성시구역교통운수차량。침대기특수적차체결구，제출료경고적차내조성공제요구。통과선로조성시험，화100%저지판열차차내성원특성적계통측시，정성분석료차내현저성원적전체로경，재차기출상제출차내감진강조건의조시。시험결과표명，100%저지판열차차내각개측점적성원능량주요집중재중심빈솔400 Hz～1250 Hz적1/3배빈대，성원위치주요위우지판、정판이급풍당구역。차내최현저빈대성원적전체로경이공기전성위주。공제차량외부공기성원，제고차체결구적밀봉、격성성능시강저차내조성적가행방법。연구결과가위100%저지판열차차내감진강조제공삼고。
The 100 % low-floor train is a new type of green urban railway transportation tools. However, control of interior noise is a more complicated issue due to its special car body’s structure. In this paper, based on the field measurements, the characteristics of the interior noise source of the 100%low-floor train are analyzed. Then, a qualitative analysis is done to identify the transmission path of the significant interior noise sources. On this basis, measures for reduction of interior noise and vibration are proposed. The results show that the sound source power of the interior noise is mainly concentrated on the 1/3 octave frequency band with the central frequency of 400 Hz~1 250 Hz. The interior noise sources are mainly located in the floor, roof, vestibule diaphragm, etc. And the air-borne sound is the key noise transfer mode. It is a feasible way to reduce the interior noise by controlling the external noise and improving the sealing and sound insulation of the car body. This work provides a basis for further finding the interior noise control measures for the 100%low-floor railway train.